Martinsville is a city located in Clark County Illinois. With a 2020 population of 1,062, it is the 642nd largest city in Illinois and the 10055th largest city in the United States . Martinsville is currently declining at a rate of -1.21% annually and its population has decreased by -9.00% since the most recent census, which recorded a population of 1,167 in 2010. Martinsville reached it's highest population of in . Spanning over 2 miles, Martinsville has a population density of 526 people per square mile.
The average household income in Martinsville is $52,044 with a poverty rate of 16.76%. The median rental costs in recent years comes to $525 per month, and the median house value is $70,800. The median age in Martinsville is 33.1 years, 31.7 years for males, and 33.6 years for females.